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Emil Kraepelin, a prominent German psychiatrist, passed away in 1926. He played a pivotal role in shaping modern psychiatry, particularly through his influential textbook "Psychiatrie" and his research on classifying mental illnesses. Kraepelin's contributions to the field include the distinction between dementia praecox (later known as schizophrenia) and manic depression, laying the groundwork for future advancements in understanding and treating mental disorders.